Phenotypic effects of overexpression of Agrobacterium rhizogenes T-DNA ORF13 in transgenic tobacco plants are mediated by diffusible factor(s) |
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Authors: | Geneviève Hansen Danièle Vaubert Jean Noël Héron Danielle Clérot Jacques Tempe Jean Brevet |
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Institution: | Institut des Sciences Végétales, CNRS 91198, Gif Sur Yvette, France;Laboratoire INRA de Pathologie Végétale, Institut National Agronomique Paris-Grignon, 75231 Paris 05, France |
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Abstract: | Nicotiana tabacum cv. Xanthi transgenic plants expressing ORF13 of Agrobacterium rhizogenes 8196 T-DNA under the 35S RNA promoter from the cauliflower mosaic virus displayed developmental abnormalities. They were small, with short and variable internodal lengths, their root systems were poorly developed; leaves were small, asymmetric, rounded, wrinkled and dark green; flowers were short, and irregularly shaped. They exhibited reduced apical dominance and regularly produced offshoots at the base of the plant. This phenotype was also exhibited by offshoots of normal N. tabacum cv. Xanthi stock grafted with a transgenic scion indicating that expression of ORF13 influences plant development via diffusible factor(s). |
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